Cooling evaporator



July 5. 1932. R. w. KRITZER 1,865,924

COOKING EVAPORATOR Filed Aug. 11, 1950 3 Sheets-Sheet l iiiiiill JVO/O/1 I o o 7 L E157. j 4 Ric&ard. M [(Hfzer INVENTOR ATTORNEYS July 5,1932. R. w. KRITZER COOKING EVAPORATOR Filed Aug. 11, 1930 5Sheets-Sheet 2 ill/ll iilldillioi I Richardv WirifzerrI/IIIIIIIIIl/IFill!!! INVENTOR ATTORNEYS July 5, 1932. w KRlTzER1,865,924

COOKING EVAPORATOR Filed Aug. 11, 1930 3 Sheets-Sheet 3 /7 /9 2/ 7Richard mm?! L INVENTOR w/T BY M r m 7 Pg;

@ 1 ATTORNEYS Patented July 5 I932 mm smrss earner orrica RICHARD W.KRITZER, OF CHICAGO, ILLINOIS, ASSIGNOR TO PEERLESS ICE MACHINE COMPANY,OF CHICAGO, ILLINOI8 coonme- Evaromroa Application filed August 11,1930.. Serial No. 474,438.

My invention relates to improvements in cooling evaporators, and itconsists in the combinations, constructions, and arrangements hereindescribed and claimed.

An object of my invention is to provide a cooling evaporator whereby thelocal air as in a room or a building may be refrigerated.

A. further object is to provide a device of the type described in whicha novel cooling unit is provided and constructed in such a. manner thata high degree of cooling efliciency is attained with a minimum amount ofstructure.

A further object is to provide a device of the type described employingnovel means through which the humid warm air in a room. or a buildingmay be passed through a. novel cooling unit and discharged into the roomor building, and in which a simple and yet artistic casing isemployedfor enclosing the mechanism.

A further object is to provide a device of the type described in whichanovel cooling unit is employed and constructed from a minimum number ofparts which are arranged in such a manner as to re Hire a minimum amountof refrigerant li uid and for providing a maximum amount 0 surface area.

Other objects and advantages will appear in the following specification,and the novel features of the invention will be particularilg pointedout in the appended claims.

y invention is illustrated in the accompanying drawings, forming part ofthis application, in which Figure. 1 is a side elevation of myinvention, I

Figure 2 is an enlarged detail view, partly in section, of the head,

Figure 3 is a sectional detail view taken along the line 33 of. Figure2,

Figure 4 is a sectional detail view taken substantially along the line44 of Figure 3,

Fi ure 5 is a sectional view taken alongthe l1ne 5'-5 of Figure 3, IFigure 6 is a sectional view taken along the line 6--6 of Figure 3,

. Figure 7 is a top plan view of a portion of the cooling unit, and LFigureS is a view of the opposite end of N the structure shown in Figure7.

In carrying out my invention, I make use of a casing comprising a head 1having an air inlet opening 2 and an air outlet opening 3. The head maybe formed integrally with a base portion 4. It will be understood,however, that while I have shown my invention in the present instance inconnection with a casing of the pedestal type, other types of casingsmay be provided. The present casing is one which is adapted to be placedupon a floor or other similar suitable supportlng structure. Theinvention may of course be embodied in any suitable casing, as, forinstance, one which may be suspended from a ceiling or supported uponbrackets carried by a wall. In the present instance I have shown thehead 1 as being formed from suitable sheet material and constructed as aseparate part from the base construction 4.

The head ma be secured to the flared portion 5 of the ase by welding orriveting. The base is also formed from sheet material in the presentinstance. Such a construction provides a suitable casing for certainconduits which I have shown in Figures 1 and 3 and which will be morefully explained later. The openings 2 and 3 are provided with flanges 6and 7 respectively. It will be noted in referring to Figure 3 that theflange 6 is considerably longer than the flange 7 and that the flangeencloses a fan 8 associated with a motor 9. A second fan 10 associatedwith a motor 11 is disposed in close proximity to the opening 3. Themotors may be mounted upon a supporting member 12, the ends of which aresecured to the sides of a cooling unit as by welding, which I haveindicated generally at 13, see Figures 2 and 3. comprises spaced-apartsections 14 and. 15. The sections are arranged to contain a refrigerantliquid and function as a single unit.

The sections 14 and 15 are identical in construction and are formed froma series of plates. In Figures 4 to 8, inclusive, I have shown theplates in detail; A pair of plates provides an assembly which may bedefined as a dependin heat exchange member. In referring .to F1gures 3and 5, it will be noted The cooling unit that each plate is providedwith a plurality of grooves 16 which communicate with cross grooves 17.In referring again to Figure 5, and particularly to Figures 7 and 8, itwill be seen that the grooves are formed in such a manner that when theplates are positioned together in a certain way, twice as manyrefrigerant passageways are provided in each depending heat exchangemember as there are grooves in a single plate. The plates may be securedtogether by welding.

The upper end formed as at 18, see Figure 7, while the lower ends of theplates are formed as at 19, see Figure 8. Thus it will be seen that anopening 20 is provided in the upper end of each of the heat exchangemembers and that an opening 21 is provided in the opposite end of eachof the members. These openings communicate with the grooves 16 throughthe medium of the cross grooves 17. Afloat chamber 22 is disposed uponthe upper ends of the sections 14 and 15 and communicates with theinterior of the heat exchange members through the medium of the openings20. The float chamber may be provided with a pair of large openings 23for communicating with the openings20 in the sections 14 and 15 of thecooling unit. The upper ends of the heat exchange members may be weldedto the float chamber, whereby a rigid construction is attained. Thefloat chamber may be provided with a relatively large opening 24arranged to be closed by means of a cover 25, see Figure 3. The openings21 communicate with a cross conduit 26, see Figures 2 and 4. The ends ofthe heat exchange members are welded to the cross conduit. It will nowbe seen that a'refrigerant -liquid entering the float chamber ma passthrough the heat exchange members y reason of the groove 16 and that theheat exchange members are in communication with one another across thetops and the bottoms through the medium of the float chamber and thecross conduit. It will also be seen that the sections '14 and 15 are incommunication with each other through the medium of the float chamberand the cross conduit.

The sections 14 and 15 may rest upon supporting plates 27, see Figure 3.These plates or lugs may be secured to the sides of the flared portion5. The construction is such, however, that the sections may restdirectly upon the flared portion, at which time the plates 27 may bedispensed with. A deflecting plate 28 is disposed between the sections14 and 15 and secured thereto as by welding.

In referring to Figure 3, it will be noted that the plate 28 is inclinedand that the plate 28 serves as a protective element for the motors 9and 11. Any defrosting in connec-' ,tion with the float chamber whichresults in a dripping of any liquid from the float cham-' her willcaught by the plate 28. The

of each of the plates is.

' valve mechanism liquid may then run down the sides of the sections 14and 15. The neck of the base portion,'see Figure 3, is provided with aclosure plate 29. A drainpipe 30 has one end connected with the plate. Atube 31 passes through an opening 32 in the plate and is arranged forprotecting conduits 33 and 34 and wiring 35. The wiring is associatedwith the motors 9 and 11 for placing the latter in electrical connectionwith a suitable source of current. That portion of the base 4 above theplate 29 is arranged for receiving any liquid which may defrost from anypart of the mechanism contained within the head. The liquid is drainedaway through the drainpipe 30. Should the drainpipe for any reasonbecome clogged, an accumulation of liquid above the from damaging thecontents of the tube 31 since the latter is liquid proof.

In Figure 3 I have shown the conduit 33 as being connected with thecover 25 and above the liquid inlet 36 which communicates with theconduit 34. The liquid refrigerant enters the float chamber through theconduit 34, while the refrigerant vapor within the float chamber may bedrawn therefrom through the conduit 33. A suitable float 37 may beemployed for controlling the amount of refrigerant liquid entering thefloat chamber. Various types of valves may be employed for controllingthe liquid level. In Figure 1 I have shown the conduit 33 as beingconnected with a compressor 38. The conduit 34 is associated with acondenser 39. The latter is connected with the compressor through asuitable pipe 40. The compressor may be operated by means of a motor 41.

From the foregoing description of the various parts of the device, theoperation thereof may be readily understood. The fan 8 is preferably ofa larger capacity than the fan 10. The fan 8 projects or pushes airthrough the device, while the fan 10 projects the air from the interiorof the head from the latter through the opening 3. The flange 6 isarranged in such a manner that a maximum efliciency is attained. Thecompressor and its associated mechanism may be located within thebasement of a building. The arrangement shown in Figure 1 is'merelysuggestive and not intended as a limitation in any sense. Therefrigerant liquid enters the float chamber from the condenser 39through plate 29 will be prevented the conduit 34. When the sections 14and 15 neonate entire area ofthe heat exchange members, which of courseincreases the transfer of the heat from the air to the heat exchange members. The float chamber and the cross conduit 26 permit the refrigerantliquid to flow through the entire cooling unit. in Fig res 2 and 3 Ihave shown the openings 2 and 3 as being provided with a screen 42 as apro tection in connection with the fans 8 and 10. Any suitable structuremay be employed for protection against the fans and which pro-= vides aminimum obstruction for the movement of air through the head. The wiringfor the motors and all oi? the pipes and their 15 connections areenclosed within the casing so that an ornamentalappearance is attained.A suitable switch may be provided for closing the circuit through themotors and positionedin any convenient place not shown. an The motorsare positioned between the sections 14 and 15 in such a manner that anexceedingly compact construction is attained. It will of course beunderstood that any suitable means for driving theair tlirough the heatexchange elements may be used instead of the fans 9 and 11. It isequally obvious that the device of my invention is capable offunctioning without theuse of any fans which are rigidly, connected orassociated to with the heat exchange elements. As a matter of fact, theheat exchange elements disclosed in this application are adapted to coolthe air in a room if there are any air currents capable of passing airthrough theheat ex- 5 change members. If desired, the ordinary fan maybe used in combination with the heat exchange elements to produce such acurrent.

I claim 1. An evaporator element for cooling air an includin a coolingunit comprising a plurality o substantially parallel spaced-apart heatexchange members, said members being provided with bafiles upon each oftheir sides for deflecting air passing between the same.

es 2. An evaporator element for cooling air including a cooling unitcomprising a plurality of substantially parallel spaced-apartheatexchange members, each of said heat exchange members comprising apair of so grooved plates, the grooves in one plate being alternatelyarranged with respect to the grooves in its companion plate, and meanscommunicating with said groves for operatively connecting said' heatexchange mem- 5e bers, whereby a refrigerant fluid may be passed throughsaid members, said means comprising a float chamber provided with avalve for controlling the amount of refrigerant fluid flowing into thecooling unit. 60 Si ed at Chicago, in the county of Cook and tate ofIllinois this 6th day of August, A. D. 1930. I

RICHARD W. KRITZER.

CERTIFICATE OF CORRECTION.

Patent No. 1,865.924. July 5, 1932.

RICHARD W. KRITZER.

It is hereby certified that error appears in the above numbered patentrequiring correction as follows: In the heading of the drawings, titleof invention, for "COOKING EVAPORATOR" read COOLING EVAPORATOR; and thatthe said Letters Patent should be read with this correction therein thatthe same may conform to the record of the case in the Patent Office.

Signed and sealed this 25th day of October, A. D. 1932.

M. J Moore,

.(Seal) Acting Commissioner of Patents

